# Change Log
**2022-02-28**
* Added new parameter `pair` to the `user_open_orders` method.
**2021-07-07**
* Added Margin Websocket API documentation.
**2021-06-03**
* Added new parameter `parent_order_id_str` to the `stop_market_order_create` method.
**2021-05-20**
* Added new optional parameter `order_id` to the `order_max_quantity` method.
**2021-04-26**
* Added Margin API documentation.
**2020-11-12**
* Added new optional parameter `client_id`